Piwik debug

I install IDE zend studio and debug by zend toolbar.

But when i debug a new plugin : put point to debug in function archiveDay ( register hook : ArchiveProcessing_Day.compute ) . Although i delete all rows in archive_blob, archive_numeric but it’s not come to this point which i set to debug.

I don’t know why. Or i have install xdebug . But i think 2 kind of debug is similar. Could you explain more for me who to debug in a new plugin.

Thanks.

does your IDE break when you set breakpoints in other places, like index.php ?